MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous URLs pointing to compromised websites, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection further confirm its malicious nature, likely as a phishing or trojan delivery mechanism.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
Heuristics 8
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://crysiq.ru/uplcv?utm_term=android+emu+windows
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161429b90d8eb8---45957020411.pdf
- http://dataction.org/demo/dataction/media/sipepubugewi.pdf
- http://www.prieteniitehnicii.ro/documente/file/3399413567.pdf
- https://funbugs.ie/files/file/walabewo.pdf
- http://blossomtour.net/FileData/ckfinder/files/20210906_02D680CF79A55771.pdf
- http://digitalpolicycouncil.org/imagenes/file/10787560556.pdf
- http://seasonmediagroup.com/pic/file/kugojonidawiretudiserare.pdf
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7b1daef455b102b78b9011b47e45e1b5/nolivuviginopekajuvimeba.pdf
- https://magerp.org/upload/files/49296741620.pdf
- http://www.impactit.in/ckfinder/userfiles/files/6845666136.pdf
- http://evopizza.lt/ckfinder/userfiles/files/23738891695.pdf
- http://lnyuanzong.com/uploads/files/20210902203310.pdf
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135c8fe1e440---munogegisox.pdf
- http://aviapartner.biz/js/ckfinder/userfiles/files/zubavatofusesafezuwariw.pdf
- http://rocb-ap.org/file_media/file_image/file/vogunekexenutafaloxaz.pdf
- http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3483168202.pdf
- http://rasciindia.com/firetech/ckupload/files/51344406137.pdf
- https://oklogistic.lv/upload/file/wunumalekixu.pdf
- https://www.auto-ecole-acm.com/ckfinder/userfiles/files/pajopozujizigazidovosu.pdf
- https://dintek.eu/uploads/file/venituxetaze.pdf
- http://boldogelet.hu/media/64752120016.pdf
- https://gulf-rope.com/images/bulk_images/files/dadisume.pdf
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613394d5377c3---25639905310.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b0b5.bin14c79cbec4a2bb1591d2889b90c352da10657dac1616e0c6266d6aa9b6b87a01 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB0B5 | 15744 bytes |
font_01_sfnt_off0000d84a.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD84A | 16792 bytes |
font_02_sfnt_off0000f061.bin6554c51475ddbf5f46e879e30d00b1fbdcab3bd70446a46db6852b9f0732199c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF061 | 10268 bytes |
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